.wrap{
    overflow: hidden;
    height: 200px;
    /*根据图片数量 动态创建宽*/
    width: 1000px;
    position: absolute;
    left: 0;
}
.wrap li{
    float: left;
}
#mask{
    width: 200px;
    height: 200px;
    overflow: hidden;
    margin:5.3333rem auto;
    position: relative;
}
.arrow div{
    height: 50px;
    width: 50px;
    border: 1px solid pink;
    border-radius: 50%;
    background-color: pink;
    text-align: center;
    font: 22px/50px "";
    opacity: .7;
    float: left;
}
.arrow{
    position: absolute;
    top: 7.5rem;
    left: .65rem;
    overflow: hidden;
}
.arrow .right{
    margin-left: 6rem;
}
.colse{
    position: absolute;
    left: 6.88rem;
    top: 5.32rem;
}
.colse li{
    color: #666;
    background-color: blueviolet;
    height: .8rem;
    width: .8rem;
    text-align: center;
    font: .5333rem/.8rem "";
}